On 7/27/2021 1:20 PM, Michal Vlasák wrote:
I thought that recent Edge versions used Chrome's PDFium, as you say
with some additions (like drawing). I would have to double check that.
yes but i think with their own additions (not sure about the pdf stuff)
i do notice differences in printing so maybe that part is also different
My understanding is that U3D was the first thing they designed. It is
standardised by ECMA, so freely available. Then they came up with PRC,
which should be more space efficient IIRC. It is standardized by ISO, so
it is open, but not free.
Both formats seemed to worked fine in Acrobat and Foxit and I don't see
that changing soon.
Both have some writing support in open source tools - meshlab supports
U3D export with https://github.com/ningfei/u3d, and Asymptote supports
PRC export. Although I didn't get either to quite work and used export
from Autodesk Inventor instead for my tests.
ok, so that might stay
Not fully official, but it is only logical that they need a compatibility
layer for old documents. But, Adobe employee mentionts the use of OS Player
for these Flash using documents here:
https://community.adobe.com/t5/acrobat-reader/playing-embedded-video-without-flash/td-p/11266205/page/2
ok
Do you mean table summarizing what parts of the Acrobat JavaScript API
is supported in individual viewers?
There is a separate API for normal things:
https://opensource.adobe.com/dc-acrobat-sdk-docs/acrobatsdk/pdfs/acrobatsdk_jsapiref.pdf
ok
Do you mean existing PDFs that work in viewers or ConTeXt source files
that use these features? I can provide both.
good
I am not sure what you mean by "small set of files for media".
proper freely distributable test files
Hans
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